Which of the following compounds can non-superimposable mirror images?

Options

A.
B.
C.
D. none of the above

Answer

To determine which of the given compounds can have non-superimposable mirror images, we need to identify the chirality of each compound. A compound is chiral if it does not possess any symmetry elements such as a plane of symmetry (POS) or a center of symmetry (COS). Here’s a step-by-step solution:

### Step 1: Understand Chirality
- **Chirality** refers to the property of a molecule that makes it non-superimposable on its mirror image. This means that the molecule and its mirror image cannot be aligned perfectly, which is a characteristic of enantiomers.

### Step 2: Identify Symmetry Elements
- To determine if a compound is chiral, we need to check for symmetry elements:
- **Plane of Symmetry (POS)**: A plane that divides a molecule into two mirror-image halves.
- **Center of Symmetry (COS)**: A point in the molecule where for every atom, there is an identical atom at an equal distance on the opposite side.

### Step 3: Analyze Each Option
1. **Option 1**: Check for symmetry.
- If a plane of symmetry exists, the compound is achiral (not chiral).
- **Conclusion**: This option is not chiral.

2. **Option 2**: Check for symmetry.
- Again, if a plane of symmetry exists, the compound is achiral.
- **Conclusion**: This option is not chiral.

3. **Option 3**: Check for symmetry.
- If a plane of symmetry exists, the compound is achiral.
- **Conclusion**: This option is not chiral.

4. **Option 4**: Since the first three options are not chiral, we conclude that none of the above options can form non-superimposable mirror images.

### Final Answer
- The correct answer is **Option 4: None of the above**.